Make sure you check how old the bonds are. They quit paying interest after 30 years.
Yes, I know. I decided not to worry about it and kept the bond to give to DD even though it stopped paying interest a few years before she went off to college. She graduated over 5 years ago, so the bond has long since been cashed and it gave her a bit of a connection to the great-grandmother who died when DD was too young to remember her.